Information bulletin
Isuzu technical service bulletin IB24-K-001B for 2022-2024 Isuzu N-Series and 2018-2024 Isuzu F Series.
- Bulletin number
- IB24-K-001B
- Component
- Power train
- Summary
- INFORMATION BULLETIN: Allison recently announced a new transmission fluid: TES 668. While Allison asserts this fluid is interchangeable with TES 295 for its transmissions, it is NOT interchangeable for all Isuzu vehicles. It is important to note that 2018 to 2023 Isuzu F-Series vehicles must USE ONLY the original TES 295 fluid. See Table 1 below for the correct application of TES 295 and TES 668 transmission fluids. Refer to the applicable Workshop Manual for additional information.
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